import numpy as np

A = np.array([[56.0, 0.0, 4.4, 68.0],
              [1.2, 104.0, 52.0, 8.0],
               [1.8, 135.0, 99, 0.9]])
print A

cal = A.sum(axis=0)
print cal

percentage = 100 * A/cal.reshape(1, 4)
print percentage
